EP1531004A2 - Flüssigkeitsdispenser mit automatischer kontakfreier Regelsteuerung mit offenem Regelkreis - Google Patents

Flüssigkeitsdispenser mit automatischer kontakfreier Regelsteuerung mit offenem Regelkreis Download PDF

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Publication number
EP1531004A2
EP1531004A2 EP04024570A EP04024570A EP1531004A2 EP 1531004 A2 EP1531004 A2 EP 1531004A2 EP 04024570 A EP04024570 A EP 04024570A EP 04024570 A EP04024570 A EP 04024570A EP 1531004 A2 EP1531004 A2 EP 1531004A2
Authority
EP
European Patent Office
Prior art keywords
fluid
pipette
valve
dispensing
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04024570A
Other languages
English (en)
French (fr)
Other versions
EP1531004A3 (de
Inventor
Nicholas M. Di Trolio
Eric L. Canfield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Drummond Scientific Co
Original Assignee
Drummond Scientific Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Drummond Scientific Co filed Critical Drummond Scientific Co
Publication of EP1531004A2 publication Critical patent/EP1531004A2/de
Publication of EP1531004A3 publication Critical patent/EP1531004A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/0092—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume for metering by volume
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0213—Accessories for glass pipettes; Gun-type pipettes, e.g. safety devices, pumps
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/006—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups measuring volume in function of time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005—Valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature
    • G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/068—Indicating or recording devices with electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/14—Process control and prevention of errors
    • B01L2200/143—Quality control, feedback systems
    • B01L2200/146—Employing pressure sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/14—Process control and prevention of errors
    • B01L2200/148—Specific details about calibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/02—Identification, exchange or storage of information
    • B01L2300/025—Displaying results or values with integrated means
    • B01L2300/027—Digital display, e.g. LCD, LED
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
    • B01L3/0227—Details of motor drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
    • B01L3/0234—Repeating pipettes, i.e. for dispensing multiple doses from a single charge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/25—Chemistry: analytical and immunological testing including sample preparation
    • Y10T436/2575—Volumetric liquid transfer

Definitions

  • Drummond Scientific's associated pipetter products have been highly successful in the marketplace ⁇ making Drummond a leader in the pipetter field.
  • Drummond was one of the first if not the first to develop a practical, economical handheld gun-shaped portable pipetter device that allowed a laboratory technician or other user to depress variable-stroke push buttons to vary the amount of suction applied to the uppermost end of a pipette.
  • the user simply attaches a pipette to the gun-shaped handle and places the bottom end of the pipette into a liquid to be dispensed. Depressing the top button with a forefinger causes the pipetter to apply suction that draws liquid up into the pipette tube.
  • a conventional coupling arrangement 112 is disposed to accept and retain the open end of pipettes 54.
  • a user couples a disposable pipette to the coupler 52 to dispense a certain liquid, and then removes and throws away the disposable pipette once all of the liquid has been dispensed.
  • the user uses a fresh sterilized disposable pipette to dispense a different liquid.
  • laboratories may use higher precision pipettes made of glass or other materials that are washed and sterilized after each use.
  • a non-linear system model is used in the exemplary illustrative non-limiting device 50 to provide accurate automatic dispensing of fluid quantities from pipette P.
  • column height is indirectly measured by measuring the vacuum at the top of the column and the top of the column is sealed. This vacuum pressure is used to determine how long the valve must be opened to dispense a given desired amount of liquid.
  • the model used in the exemplary illustrative non-limiting implementation takes into account and models the non-linearity in the relationship between column height vacuum pressure and valve opening time.
  • a math coprocessor may not be necessary, depending upon the microcontroller and/or programming language used.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Sampling And Sample Adjustment (AREA)
EP04024570A 2003-11-04 2004-10-14 Flüssigkeitsdispenser mit automatischer kontakfreier Regelsteuerung mit offenem Regelkreis Withdrawn EP1531004A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US700374 1985-02-11
US10/700,374 US7396512B2 (en) 2003-11-04 2003-11-04 Automatic precision non-contact open-loop fluid dispensing

Publications (2)

Publication Number Publication Date
EP1531004A2 true EP1531004A2 (de) 2005-05-18
EP1531004A3 EP1531004A3 (de) 2005-11-23

Family

ID=34435519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04024570A Withdrawn EP1531004A3 (de) 2003-11-04 2004-10-14 Flüssigkeitsdispenser mit automatischer kontakfreier Regelsteuerung mit offenem Regelkreis

Country Status (4)

Country Link
US (2) US7396512B2 (de)
EP (1) EP1531004A3 (de)
JP (1) JP2005161307A (de)
CA (1) CA2486484A1 (de)

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WO2008128864A1 (de) * 2007-04-20 2008-10-30 Qiagen Instruments Ag Pipettiergerät mit gewichtsmessung nebst verfahren
WO2009067834A3 (de) * 2007-11-28 2009-09-03 Integra Biosciences Ag Handpi petti ergerät und verfahren zum kalibrieren
WO2010060448A1 (de) 2008-11-28 2010-06-03 Hamilton Bonaduz Ag Für die dosierung von sehr kleinen dosiervolumina geeignete dosiereinrichtung und dosierverfahren
US8216527B2 (en) 2010-01-22 2012-07-10 Tecan Trading Ag Positive displacement pump with pressure sensor
FR2993986A1 (fr) * 2012-07-24 2014-01-31 Gilson Sas Pipette de prelevement equipee de moyens permettant de detecter son inclinaison
EP3594655A1 (de) 2018-07-11 2020-01-15 INFYS sprl Elektronische sterilisierbare pipettiervorrichtung

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EP1604741A1 (de) * 2004-05-14 2005-12-14 F. Hoffmann-La Roche Ag Verfahren und Vorrichtung zur Ausgabe von Flüssigkeiten mit einem Pipettiernadel
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US7396512B2 (en) 2008-07-08
EP1531004A3 (de) 2005-11-23
US20050095723A1 (en) 2005-05-05

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